As you discovered last year, TurboTax installs and runs without any problems when you install it in the default directory. They changed the default directory from previous years. There is no need to install it in a different directory, and you had a problem last year when you forced it to install in a different directory.
The only problem is that it appears to offer you the ability to install in a different directory, but that option doesn't work. Very few users even noticed the problem or complained about it. It appears that TurboTax is not going to fix it. Just let it install in the default directory. It works fine that way. Having the software in a different directory from previous years does not cause any problems other than an aesthetic problem. The basic goal of the installation is to have a working tax program. Installing in the default directory accomplishes that goal.
